import router from "./router";
import userRouter from "./router/user";
import adminRouter from "./router/admin";
import store from "./store";
import Vue from "vue";
import { Message } from "element-ui";
import NProgress from "nprogress"; // progress bar
import "nprogress/nprogress.css"; // progress bar style
import { getToken } from "@/utils/auth"; // getToken from cookie

NProgress.configure({ showSpinner: false }); // NProgress Configuration

// permission judge function
function hasPermission(perms, permissions) {
  if (perms.indexOf("*") >= 0) return true; // admin permission passed directly
  if (!permissions) return true;
  return perms.some(perm => permissions.indexOf(perm) >= 0);
}

const whiteList = ["/login", "/auth-redirect"]; // no redirect whitelist

router.beforeEach((to, from, next) => {
  var routeTo404 = JSON.parse(sessionStorage.getItem('routerTo'))
  if(to.path == "/404") {
    to = routeTo404;
  }
  NProgress.start(); // start progress bar
  if (getToken()) {
    // determine if there has token
    /* has token*/
    if (to.path === "/login") {
      next({ path: "/" });
      NProgress.done(); // if current page is dashboard will not trigger	afterEach hook, so manually handle it
    } else {
      if (store.getters.perms.length === 0) {
        // 判断当前用户是否已拉取完user_info信息
        store
          .dispatch("GetUserInfo")
          .then(res => {
            // 拉取user_info
            // const perms = res.data.data.perms // note: perms must be a array! such as: ['GET /aaa','POST /bbb']
            const perms = {
              isAdmin:store.getters.isAdmin,
              items:[adminRouter,userRouter]
            } // note: perms must be a array! such as: ['GET /aaa','POST /bbb']
            store.dispatch('GenerateRoutes', perms).then(() => { // 根据perms权限生成可访问的路由表
              router.addRoutes(store.getters.addRoutes); // 动态添加可访问路由表
              // next({ ...to, replace: true }) // hack方法 确保addRoutes已完成 ,set the replace: true so the navigation will not leave a history record
            })
            next({ ...to, replace: true });
            console.log('router', to)
          })
          .catch(err => {
            store.dispatch("FedLogOut").then(() => {
              Message.error(err || "Verification failed, please login again");
              next({ path: "/" });
            });
          });
      } else {
        // 没有动态改变权限的需求可直接next() 删除下方权限判断 ↓
        if (hasPermission(store.getters.perms, to.meta.perms)) {
          next();
        } else {
          next({ path: "/401", replace: true, query: { noGoBack: true } });
        }
        // 可删 ↑
      }
    }
  } else {
    /* has no token*/
    if (whiteList.indexOf(to.path) !== -1) {
      // 在免登录白名单，直接进入
      next();
    } else {
      next(`/login?redirect=${to.path}`); // 否则全部重定向到登录页
      NProgress.done(); // if current page is login will not trigger afterEach hook, so manually handle it
    }
  }
});

router.afterEach((to) => {
  NProgress.done(); // finish progress bar
  sessionStorage.setItem('routerTo', JSON.stringify(to));
});
